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AssigneeGujarat Fluorochemicals Limited
InventorsV.K. SONI, S.B. GAITONDE, Bapu V GANGURDE
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The present disclosure relates to a process for preparing high purity Lithium Hexafluorophosphate (LiPF6), comprising the steps of: (a) reacting high purified anhydrous hydrogen fluoride (AHF) gas with solid phosphorous pentachloride to produce a mixture of pure phosphorous pentafluoride and hydrogen chloride gas, (b) reacting highly purified lithium fluoride dissolved in AHF solution with phosphorous pentafluoride and hydrogen chloride gas mixture obtained in step (a) to obtain LiPF6 mother liquor, which is LiPF6 dissolved in AHF; crystallizing the LiPF6 from the mother liquor in static crystallizer, separating the mother liquor, drying the product to remove HF; followed by drying and crushing of the crystals of LiPF6 to obtain LiPF6 powder.
A method for preparing ultra-high purity lithium hexafluorophosphate (LiPF6), comprising the following steps:
An ultra-high purity lithium hexafluorophosphate (LiPF6) with a purity of at least 99.97%.
Dependencies are inferred from the claim text.